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On 11/28/2011 04:26 PM, Richard Henderson wrote:
> On 11/28/2011 03:05 PM, Richard Henderson wrote:>> On 11/28/2011 02:16 PM, Alan Modra wrote:>>> Hmm, I suppose you could argue that powerpc and others ought to not>>> generate those three extra instructions when using the return value.>>> I'll see about fixing powerpc.>>>> However, we can do better by considering the value to be stored in CR0...> > Try this and see if it generates the sort of code you want. Untested.
... actually, this one. There's no reason to differentiate between strong
and weak compare-and-swap when computing boolval.
r~

On Mon, Nov 28, 2011 at 7:33 PM, Richard Henderson <rth@redhat.com> wrote:
> On 11/28/2011 04:26 PM, Richard Henderson wrote:>> On 11/28/2011 03:05 PM, Richard Henderson wrote:>>> On 11/28/2011 02:16 PM, Alan Modra wrote:>>>> Hmm, I suppose you could argue that powerpc and others ought to not>>>> generate those three extra instructions when using the return value.>>>> I'll see about fixing powerpc.>>>>>> However, we can do better by considering the value to be stored in CR0...>>>> Try this and see if it generates the sort of code you want. Untested.>> ... actually, this one. There's no reason to differentiate between strong> and weak compare-and-swap when computing boolval.
Has anyone bootstrapped and regression-tested the patch?
Thanks, David

On 11/29/2011 07:13 AM, David Edelsohn wrote:
>> ... actually, this one. There's no reason to differentiate between strong>> and weak compare-and-swap when computing boolval.> > Has anyone bootstrapped and regression-tested the patch?
Yes, I did so last night on gcc110.
r~

On Tue, Nov 29, 2011 at 10:50 AM, Richard Henderson <rth@redhat.com> wrote:
> On 11/29/2011 07:13 AM, David Edelsohn wrote:>>> ... actually, this one. There's no reason to differentiate between strong>>> and weak compare-and-swap when computing boolval.>>>> Has anyone bootstrapped and regression-tested the patch?>> Yes, I did so last night on gcc110.
Great. Then the patch is okay with me, if you have not committed it already.
Thanks!
David